Staybolt-heading attachment for pneumatic hammers



E. 0. GRIMES, 111., AND 0. F. BALTZLEY. STAYBOLT HEADING ATTACHMENT ronPNEUMATIC HAMMERS.

' APPLICATION FILED MAR, 20, 1919.

1,339,453. I I Patented May 11,1920.

Q *2 I. a Nag 1, Z @TTHIIIIIIH d INVENTOR BYMfG' whereby the operationUNITED srA'rEs PATENT OFFICE.

ELIAS omvnn GRIMES, an, or

TOWN, MARYLAND,

WESTMINSTER, AND GREEN F. BALTZLEY, 0F HAGERS- ASSIGNORS TO THE LIBERTYTOOL COMPANY, OF BALTIMORE,

MARYLAND, A CORPORATION OF MARYLAND.

STAYBOLT-HEADING- ATTACHMENT FOR PNEUMATIC HAMMERS.

Specification of Letters Patent.

Patented May 11, 1920.

, Application .filed March 20, 1919. Serial No. 283,750.

To all whom/2'13 may concern:

Be it known that we, ELIAS OLIVER GnIMns, Jr., and OREN F. BALTZLEY,citi- Zens of the United States, residents of Westminster, Maryland, andHagerstown, Maryland, have invented certain new and useful Improvementsin Staybolt-Heading At tachments for Pneumatic Hammers, of which thefollowing is a specification.

Our invention is an improvement upon that disclosed in Letters Patent ofthe United States granted July. 17, 1917, #1233560, and concernsparticularly means tachment may be observed by the operator and at thesame time the tool will not be exposed in such manner-as to endanger theoperator, the device serving as a guard against placing of the hand orfinger in position to be subject to injury.

The invention consists in the features hereinafter described andparticularly pointed out in the claims.

In the accompanying drawings:

Figure 1 is a vertical sectional view attachment.

Fig. 2 is a sectional view of a portion of Fig. 1, the line of sectioncutting the wall at a point between the sight openings.

Fig. 3 is a bottom plan view.

The general combination of elements of the apparatus is like thatdisclosed in the patent above referred to, including a tubular casing orbody 1 having a socket at its upper end adapted to receive the lower endof the hammer barrel, a ram 2 slidably mounted in the casing and guidedat its lower end through a washer or bushing 3 which is removably heldby screw 3, the lower end of the ram being of conical form to act uponthe rivet head. A partition member 1 is integrally formed in the casingand the ram is provided with a flange 5 which serves as a limiting stopin the upward movement of the ram. A spring 6 is interposed between thebushing 3 and the flange 5 to press the ram upwardly. A ring or collar 7is arranged in the casing above the partition 4:. b

At the lower end of the casing a flange 1 is provided integrally withthe casing and concentric with the axis of the ram, this flangeextending down below the lower end of the ram when the latter is in itsupperof the of the heading at most position. This flange, like in thepatent above referred to, is intended to serve as a guide by bearingupon the head of the rivet so that the tool can be moved about the riveteccentrically while maintained in connection therewith. In order toobserve the operation of the ram upon the rivet head we provide openingsat a and these openings extend through the body of the casing, the innerwalls being inclined at a inwardly and downwardly and terminating at ornear the bore of the casing in which the bushing 3 is located.

We prefer to make four of these open ings about the casing and these areof considerable extent, leaving intact a portion 6 between them. Throughthese openings the action of the tool on the rivet head may be observedand because of the formation of the openings at an inclination the metalof the casing at a is carried down to the normal level of the lower endof the ram so as to form guards against the accidental introduction ofthe fingers to a position where damage by the ram might result.

The inclined openings give a good view of the action of the ram. Theseopenings are above the lower edge of the flange and leave the flangeintact all around the circumference of the attachment.

It will be noted that the lower portion of the body or casing isenlarged in diameter and the inclined openings are formed through thisenlarged portion so that the strength of the casing is preserved. Theopenings also cut partly through the upper portion of the flange at thepoint where it joins the body of the casing.

It will be noticed that the bore of the casing which contains the ram isof the full diameter,-throughout, of the flange 5 of the ram, so thatwhen the bushing 3 is removed the ram, together with the spring, can beinserted from below and the flange 1 can be integral with the casinginstead of being screwed into place.

Reverting to the sight openings it will be observed that the dependingportions a of the body where the openings 0; are formed are spaced apartfrom the ram a distance equal to the thickness of the bushing 3 so thatthe edge of the ram lies some distance awayv from the lower edge of thesight opening or in other words, some distance away from the lower edgeof the depending guard portion a due to the guide shoulder or bushing 3and therefore a workman could not get his finger caught by the rambecause of the depending guard together With the location of the edge ofthe ram at some distance away therefrom toward the axial center of theappliance. r

If we consider the relative location of the depending guard portion tothe mouth of the sight opening a it may be said that this guard dependsacross thelevel of the mouth of the opening.

We claim as our invention:

1. In combination in an attachment for pneumatic hammers a casing havinga socket at its upper end to receive the hammer barrel, a ram within thecasing, said casing having a downwardly extending flange concentric withthe ram to bear upon the side of the rivethead, and having also anopening inclining downwardly and inwardly through its body and withinthe circuit of the flange leaving an inner guard portion dependingacross the level of the mouth of the opening, substantially asdescribed.

2. In combination in an attachment for pneumatic hammers a casing havinga socket at its upper end to receive the hammer barrel, a ram Within thecasing, said casing having a downwardly extendingportion dependingacross the level of the mouth ofthe opening, and a guide bushing for thelower end'of the ram said depending guard having its lower edgeseparated from the edge bushing.

I 8.-In combination a casing having an integral internal flange with abore of one diameter throughout below said flange, a removable bushingat the lower end of the casing, means to hold said bushing in place anda ram guided in said bushing andhaving a flange of a diameter equal tothe bore of the casing and a spring between the,

flange of the ram and the removable ing, substantially as described.

' In testimony whereof, we aflix our signatures. 7

bush- E. OLIVER GRIMES, JR; VOREN F. BALTZLEY.

of the ram 'by said guide

